This pair of images shows New Jersey, New York, and eastern Pennsylvania as viewed at night by the Visible Infrared Imaging Radiometer Suite (VIIRS) on the Suomi NPP satellite. The top image was taken at 2:52 a.m. Eastern Daylight Time (06:52 Universal Time) on November 1, 2012. For comparison, the lower image was taken at 2:14 a.m. Eastern Daylight Time (06:14 UTC) on August 31, 2012, when conditions in the area were normal.

Both images were captured by the VIIRS “day-night band,” which detects light in a range of wavelengths from green to near-infrared and uses filtering techniques to observe signals such as gas flares, city lights, and reflected moonlight. In the top image, lingering clouds from Hurricane Sandy are lit by moonlight and obscure much of New York’s Hudson Valley, northwestern New Jersey, and northeastern Pennsylvania. (For a wider view, download the large image beneath each web image.)

Turn on the “view image comparison” button to see the difference in city lighting before and after the blackout. In Manhattan, the lower third of the island is dark on November 1, while Rockaway Beach, much of Long Island, and nearly all of central New Jersey are significantly dimmer. The barrier islands along the New Jersey coast, which are heavily developed with tourist businesses and year-round residents, are just barely visible in moonlight after the blackout.

Along with the scattered electric lights, there is a bright point along the shore south of Mantoloking, New Jersey, that could be fires fueled by severed natural gas lines. Note: It is not clear if the fires reported on October 31 were still burning on November 1.

NASA Earth Observatory image by Jesse Allen and Rob Simmon, using VIIRS Day-Night Band data provided by Cooperative Institute for Meteorological Satellite Studies (CIMSS) at the University of Wisconsin. VIIRS is an instrument on the Suomi NPP satellite, a partnership between NASA, the National Oceanic and Atmospheric Administration, and the Department of Defense. Caption by Mike Carlowicz.